Improvement in electro-magnetic safe-locks



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Letters liatent' No. 107,993, dated October 4, 1870 z-entedated September 24,1870.

IMPROVEMENT IN'IELECITRO-MAGNETIC SAFE-LOCKS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it army concern:

Be it known that I, CHARLES O. YALE, of New York, in the county of New York and State of New York, have inventedcertain new and useful Improvements in Safes, and analogous depositaries for valuables; and I do hereby declare that the following is a full and exact description thereof.

My invention relates to means for connecting from a battery outside to an eleotro-magnet in or about the look, so as to unlock the, safe by the same means, and thus be always certain that the connections and the entire apparatus are in order at the time of lockin g.

My invention is applicable to all forms and constructions of batteries, and to all known or practicable arrangements of helices, and analogous apparatus for operating the lock, or the corresponding part which holds the door. The magnet may act directly upon a heavy bolt which holds the door, or it may act upon a secondaryand lighter bolt which holds or dogs the main bolt, or it may act upon a third or fourth member, so as to attain great delicacy in its mode of operation.

I have not esteemed it necessary to indicate any of the refinements to which the other parts may be carried, but will represent my invention as applied to he very simplest form of a blocking-bolt, acting as'a latch. p 1 The accompanying drawing forms a part of this specification. p

Figure l is a view of the inside of a door and doorframe (or section on T T, fig. 2.

Figure 2 is a section on the line S S, in fig. 1.

Figures 3, 4, and 5, represent modifications.

Figure 3 shows the safe-door as made with two thicknesses of burglar-proof material. 1

.Figure 4 shows the door as made with only one thickness thereof.

Figure 5 shows itmade with five thicknesses.

Figure 6 shows thewire before it is introduced in the previously-prepared holes and channels.

Similar letters of reference indicate corresponding parts in all the figures.

The door of the safe is indicated collective] y by the single letter A. It is made up, as usual, of several thicknesses of hardened steel, Frauklinitc iron, chilled iron, or other hard material. These several thicknesses may be alike, or different in their structure.

through this inner sheet or thickness A of the door.

From this hole a channel leads along laterally between the innner thickness A} and the exterior sheet or thickness A. After extending along in this way for a considerable. distance, say two or more inches, the conducting-wire c is passed outward through a corre-' sponding hole in the thickness A. The olfsets may be increased in number according to the number of thicknesses of the material A, A, &c. It may be led in the same or a different directionlaterally, or

upward, or downward, or obliquely, for the same or a.

greater or lesser distance between each of the layers. On the exterior thickness, here represented as A, it is well guarded by a thimble of glass, or other suitable non-conductor, around the wire; and, if preferred, the whole exterior surface may be blackened over, and made to correspond in appearance with the other portions of the surface of the safe; or, many points on the exterior surface maybe provided with precisely similar non-conducting rings or thimblcs, with the end of similar wire correspondingly presented. These false Wires would aid to deceive a burglar in applying a battery to open the lock surreptitiously. I

I do not propose to indicate in detail the means, which may be of any approved character, for securing my lock against being opened by the application of a battery by an unauthorized person.

My invention relates entirely to the insulation and security of the connection against injury to the safe by violence on the one hand, or a loss of effect by the escape of the current on the other. My connection is secured against both these evils.

It will be understood that a series of rings, or beads of glass, or analogous nonconductor, is threaded upon the wire 6 so as to envelope, and keep it entirely out of contact with the metal of the door, not only during its passage through the hole in each thickness A A", &c., but also along the channel provided for it be tween the two thicknesses. These beads are marked 1) in figs. 2 and 6.

In case of the application of a drill, or a like tool, to bore out the wire and its .surrounding insulating material, the drill will traverse only through the hole in the exterior plate A before 'it will be arrested by the next interior plate. It is impossible for any known J. LONAs; Thrashing Machine.

Patented Oct 4,1870,

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